(Portland, OR) -- Authorities say a grease plug in the sewer line was responsible for a 400-gallon raw sewage flood on Southeast 82nd Avenue at Division late Wednesday night. City of Portland crews stopped the leak about an hour after it was reported. They were able to clean up the mess and disinfect the area before the morning commute. Authorities are asking residents who dispose of grease to put it in a solid container and throw it away in your garbage rather than rinsing it down the drain.